These two watches have some serious balls.
Vintage mystery dial watches often have inventive displays of timekeeping as do the 1940's Mido (above) and 1965 Gruen (below) which both feature floating balls for hands. Attached to disks, the balls spin in a typical rotation but the solid 14k solid gold Gruen has a very unusual minute hook-hand that clears the little pearl hour orb with each passing.
